640115464352 has 96 divisors (see below), whose sum is σ = 1556948397312. Its totient is φ = 252269328384.

The previous prime is 640115464337. The next prime is 640115464397. The reversal of 640115464352 is 253464511046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347948 + ... + 1183764.

It is an arithmetic number, because the mean of its divisors is an integer number (16218212472).

Almost surely, 2^640115464352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640115464352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778474198656).

640115464352 is an abundant number, since it is smaller than the sum of its proper divisors (916832932960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640115464352 is a wasteful number, since it uses less digits than its factorization.

640115464352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836110 (or 836102 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

Adding to 640115464352 its reverse (253464511046), we get a palindrome (893579975398).

The spelling of 640115464352 in words is "six hundred forty billion, one hundred fifteen million, four hundred sixty-four thousand, three hundred fifty-two".